Securing device for dental brush-mandrels.



P. N. SOUZON. SECURING DEVICE FOR DENTAL BRUSH MANDBELS. APPLICATION FILED MAY 7, 1913.

1,1 07,63 1 Patented Aug. 18, 1914 WITNESSES 'Mh INVENTOR w/ I ATTORNEYS IIIL NORRIS PETERS C0..PHO10-LITHO.. WASHINGTON. D L.

PETER N. SOUZON, OF PHILADELPHIA, PENNSYLVANIA.

SECURING DEVICE FOR DENTAL BRUSH--MANDRELS.

Specification of Letters Patent.

Application filed May 7, 1913. Serial No. 766,073.

Patented Aug. 18, 1914.

To all whom it may concern Be it known that 1, PETER N. SOUZON, a citizen of the United States, residing in the city and county ofPhiladelphia, State of Pennsylvania, have invented a new and use ful Securing Device for Dental Brush-Man.

the brush, by reason of centrifugal action,

to become more firmly engaged and interlocked with the mandrel, so that the faster said mandrel rotates, the more tightly will the brush and its adjuncts engage said mandrel, means being provided for enabling the brush and its adjuncts to be readily detached from the mandrel. by thefingers of the operator, for the purpose of placing a new brush in position.

To the above ends, my invention consists of a novel construction of a dental brush mandrel. and its adjuncts, having an angular or triangular-shaped recess or surface thereon, and an enlarged or flaring portion at or near the mandrel shoulder, whereby as the mandrel rotates, the brush ferrule will tightly engage said flaring portion and will become firmly locked in position by centrifugal action.

To the above ends, my invention consists of a novel construction of a dental mandrel and its adjuncts, having a novel journal bearing thereon, whereby the brush and its ferrule are more firmly held in position by centrifugal action, but can be readily replaced, according to requirements.

For the purpose of illustrating my invention, I have shown in the accompanying drawings one form thereof which is at present preferred by me, since the same has been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be vari- .ously arranged and organized and that my invention is not limited to theprecise arrangement and organization of these instrumentalities, as herein shown and described.

Figure 1 represents a perspective view of a dental mandrel and brush assembled thereon, embodying my invention. Fig. 2 represents a section on line :cm, Fig. 1. Fig. 3

represents on an enlarged scale a side elevation of my novel dental mandrel, showing especially my novel journal bearing. Fig. i represents a perspective View of the brush ferrule and its adjuncts. Fig. 5 represents the mandrel shown in Fig. 3, viewed from a different position.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings :-1 designates adental mandrel provided with a flange or shoulder 12, from which projects the slightly tapered portion 3 and the journal 4, which is of substantially uniform diameter, and is provided at its outer extremity with the slightly flattened portion or opening 5 and the angularly extending walls 6, whereby the flattened surface 7 is formed.

. i) designates the brush ferrule, 011 the innor bore of which is the inwardly extending projection or indentation 8, which may be formed in any suitable manner on the forrule of the brush 10, which latter may be of any suitable construction, and does not, per ec, form any part of the present invention.

It will be apparent, when the ferrule 9 is slipped upon the journal. at and the parts assembled, as will be understood from Fig. 2, that the indentation or locking pin 8 will pass the point and enter the flattened surface 7 until the ferrule base contacts with the tapered portion 3. The locking pin or indentation S as soon as rotation is imparted to the mandrel 1 will be caused by centrifugal action to contact with one or the other of the inclined walls 6, so that the faster the spindle or mandrel 1 rotates, the ferrule 9 will be caused to travel inwardly toward the flange or shoulder 2, and the contact of its inner or base portion with the flaring surface 3, will cause an exceedingly tight and intimate contact to be made between the brush ferrule and its mandrel, and the faster the mandrel rotates, the more secure will be the connection between the two.

hen it is desired to replace the brush, it is only necessary to dislodge the same from the position seen in Fig. 2, so that the pin 8 may be withdrawn through the flattened portion 5, which can be readily done by the fingers of the user, and another brush can be placed in position without removing the mandrel from the dental engine.

It will be seen from the foregoing that by my novel construction, I have produced an appliance, whereby the brush member can be readily interlocked with its revolving mandrel, and the faster the latter rotates, the more intimate will be the connection between the brush and its mandrel.

It will now be apparent that I have devised a novel and useful construction of a dental brush mandrel, which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and while I have, in the present instance, shown and described a preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit or scope of the inventionor sacrificing any of its advantages.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, 1s:

The combination of a rotary driven memher having an internal bore with a projection and shoulder upon actuation by said driving member.

PETER N. SOUZON.

Vitnesses dos. F. EDWARD, ANNA E. 0005.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

